The approval was just 21 percent for the American Health Care Act, four points higher than the last survey on the issue.

Twenty-three percent of respondents said they didn't know or couldn't answer the question.

Another question asked what should be done about ObamaCare. Nineteen percent of respondents said it should be totally repealed, 45 percent said parts of the bill should be repealed and 34 percent said there should be no repeal.

The poll comes as GOP lawmakers face anger at town hall events, particularly over the plan for coverage of pre-existing conditions. ObamaCare prevents insurers from charging higher rates to people with pre-existing conditions.

The bill passed after an agreement to provide billions of dollars in aid to help people with pre-existing conditions afford coverage, though critics say the amount is insufficient.

On "America's Newsroom" today, former CBO Director Doug Holtz-Eakin said it's not realistic for Democrats to propose keeping ObamaCare in place.

He pointed to the fact that one-third of U.S. counties have only one health insurance option, while Aetna just announced it would depart the ObamaCare markets entirely.

"I think if people understood what was inside [the bill] and the realistic choices they face, they'd think about it differently," Holtz-Eakin said.

Former prosecutor Bob Bianchi said Tuesday that Judge Emmet Sullivan can sentence Gen. Michael Flynn [Ret.] to more than the expected probationary punishment he is considering after the war hero pleaded guilty to lying to the FBI.